HFC0400 Datasheet, PDF (1/25 Pages) Monolithic Power Systems – Fixed Frequency Flyback Controller with Ultra-low No Load Power Consumption

HFC0400
Fixed Frequency Flyback Controller
with Ultra-low No Load Power Consumption
The Future of Analog IC Technology
DESCRIPTION
HFC0400 is a fixed-frequency current-mode
controller with built-in slope compensation. It
targets medium-power, off-line, flyback, switch-
mode power supplies. At light loads, the
controller freezes the peak current and reduces
its switching frequency down to 25kHz to offer
excellent light-load efficiency.
At very light loads, the controller enters burst
mode to achieve very low standby power
consumption.
HFC0400 offers frequency jittering to help
dissipate energy generated by conducted noise.
HFC0400 also has an X-cap discharge function
to discharge the X-cap when the input is
unplugged.
HFC0400 features multiple protections that
include thermal shutdown (TSD), VCC under-
voltage lockout (UVLO), overload protection
(OLP), over-voltage protection (OVP), and
brown-out protection.
HFC0400 is available in an SOIC8-7A package.
FEATURES
 Fixed-frequency current-mode control with
built-in slope compensation
 Frequency foldback down to 25kHz at light
loads
 Burst mode for low standby power
consumption
 Frequency jitter to reduce EMI signature
 X-cap discharge function
 Internal high-voltage current source
 VCC under-voltage lockout with hysteresis
(UVLO)
 Brown-out protection on HV pin
 Overload protection with programmable
delay
 Thermal shutdown (auto-restart with
hysteresis)
 Latch-off for external over-voltage protection
(OVP) and over-temperature protection
(OTP) on TIMER pin
 Short-circuit protection
 Programmable soft start
APPLICATIONS
 AC/DC adapters for notebook computers,
tablets, and smartphones
 Offline battery chargers
 LCD TV s and monitors
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
HFC0400 Rev. 1.0
www.MonolithicPower.com
1
11/28/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.